unit comm_unitinterface
procedure check_key(var key:char);///////////////////////////////
impkementationprocedure check_key(var key:char); begin
if not (key in ['0'..'9','.',#8]) then
key:=#0;
end;end.
procedure check_key(var key:char);///////////////////////////////
impkementationprocedure check_key(var key:char); begin
if not (key in ['0'..'9','.',#8]) then
key:=#0;
end;end.
如:
procedure name.................
//************************************ 要加下一行
procedure check_key(var key:char);
//************************************implementationprocedure check_key(var key:char);
begin
if not (key in ['0'..'9','.',#8]) then
key:=#0;
end;